(1) The Principal Act is amended -

(a) in section 598(6)(b) by deleting "and such assessment may be made at any time not more than 10 years",

(b) in section 599(4) by deleting paragraph (b), and

(c) in section 611(1) by deleting paragraph (c).

(2) This section applies to disposals giving rise to a clawback of relief under section 598, 599 or 611 of the Principal Act where such disposals are made on or after the date of the passing of this Act.